diff options
author | Joe Perches <joe@perches.com> | 2016-06-24 18:32:26 (GMT) |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-07-01 14:37:06 (GMT) |
commit | 4ae89ad92477219b504a49966ee010fe8dcb85af (patch) | |
tree | 6f276cd42d61899ce9f6952c87361c059295790f /net/bridge | |
parent | 468b021b944922e8fe0a30b6b6e0532bb95e4edc (diff) | |
download | linux-4ae89ad92477219b504a49966ee010fe8dcb85af.tar.xz |
etherdevice.h & bridge: netfilter: Add and use ether_addr_equal_masked
There are code duplications of a masked ethernet address comparison here
so make it a separate function instead.
Miscellanea:
o Neaten alignment of FWINV macro uses to make it clearer for the reader
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/bridge')
-rw-r--r-- | net/bridge/netfilter/ebt_arp.c | 17 | ||||
-rw-r--r-- | net/bridge/netfilter/ebt_stp.c | 49 | ||||
-rw-r--r-- | net/bridge/netfilter/ebtables.c | 17 |
3 files changed, 34 insertions, 49 deletions
diff --git a/net/bridge/netfilter/ebt_arp.c b/net/bridge/netfilter/ebt_arp.c index cd457b8..cca0a89 100644 --- a/net/bridge/netfilter/ebt_arp.c +++ b/net/bridge/netfilter/ebt_arp.c @@ -65,7 +65,6 @@ ebt_arp_mt(const struct sk_buff *skb, struct xt_action_param *par) if (info->bitmask & (EBT_ARP_SRC_MAC | EBT_ARP_DST_MAC)) { const unsigned char *mp; unsigned char _mac[ETH_ALEN]; - uint8_t verdict, i; if (ah->ar_hln != ETH_ALEN || ah->ar_hrd != htons(ARPHRD_ETHER)) return false; @@ -74,11 +73,9 @@ ebt_arp_mt(const struct sk_buff *skb, struct xt_action_param *par) sizeof(_mac), &_mac); if (mp == NULL) return false; - verdict = 0; - for (i = 0; i < 6; i++) - verdict |= (mp[i] ^ info->smaddr[i]) & - info->smmsk[i]; - if (FWINV(verdict != 0, EBT_ARP_SRC_MAC)) + if (FWINV(!ether_addr_equal_masked(mp, info->smaddr, + info->smmsk), + EBT_ARP_SRC_MAC)) return false; } @@ -88,11 +85,9 @@ ebt_arp_mt(const struct sk_buff *skb, struct xt_action_param *par) sizeof(_mac), &_mac); if (mp == NULL) return false; - verdict = 0; - for (i = 0; i < 6; i++) - verdict |= (mp[i] ^ info->dmaddr[i]) & - info->dmmsk[i]; - if (FWINV(verdict != 0, EBT_ARP_DST_MAC)) + if (FWINV(!ether_addr_equal_masked(mp, info->dmaddr, + info->dmmsk), + EBT_ARP_DST_MAC)) return false; } } diff --git a/net/bridge/netfilter/ebt_stp.c b/net/bridge/netfilter/ebt_stp.c index e77f90b..45f73d5 100644 --- a/net/bridge/netfilter/ebt_stp.c +++ b/net/bridge/netfilter/ebt_stp.c @@ -46,7 +46,6 @@ static bool ebt_filter_config(const struct ebt_stp_info *info, const struct ebt_stp_config_info *c; u16 v16; u32 v32; - int verdict, i; c = &info->config; if ((info->bitmask & EBT_STP_FLAGS) && @@ -54,66 +53,62 @@ static bool ebt_filter_config(const struct ebt_stp_info *info, return false; if (info->bitmask & EBT_STP_ROOTPRIO) { v16 = NR16(stpc->root); - if (FWINV(v16 < c->root_priol || - v16 > c->root_priou, EBT_STP_ROOTPRIO)) + if (FWINV(v16 < c->root_priol || v16 > c->root_priou, + EBT_STP_ROOTPRIO)) return false; } if (info->bitmask & EBT_STP_ROOTADDR) { - verdict = 0; - for (i = 0; i < 6; i++) - verdict |= (stpc->root[2+i] ^ c->root_addr[i]) & - c->root_addrmsk[i]; - if (FWINV(verdict != 0, EBT_STP_ROOTADDR)) + if (FWINV(!ether_addr_equal_masked(&stpc->root[2], c->root_addr, + c->root_addrmsk), + EBT_STP_ROOTADDR)) return false; } if (info->bitmask & EBT_STP_ROOTCOST) { v32 = NR32(stpc->root_cost); - if (FWINV(v32 < c->root_costl || - v32 > c->root_costu, EBT_STP_ROOTCOST)) + if (FWINV(v32 < c->root_costl || v32 > c->root_costu, + EBT_STP_ROOTCOST)) return false; } if (info->bitmask & EBT_STP_SENDERPRIO) { v16 = NR16(stpc->sender); - if (FWINV(v16 < c->sender_priol || - v16 > c->sender_priou, EBT_STP_SENDERPRIO)) + if (FWINV(v16 < c->sender_priol || v16 > c->sender_priou, + EBT_STP_SENDERPRIO)) return false; } if (info->bitmask & EBT_STP_SENDERADDR) { - verdict = 0; - for (i = 0; i < 6; i++) - verdict |= (stpc->sender[2+i] ^ c->sender_addr[i]) & - c->sender_addrmsk[i]; - if (FWINV(verdict != 0, EBT_STP_SENDERADDR)) + if (FWINV(!ether_addr_equal_masked(&stpc->sender[2], + c->sender_addr, + c->sender_addrmsk), + EBT_STP_SENDERADDR)) return false; } if (info->bitmask & EBT_STP_PORT) { v16 = NR16(stpc->port); - if (FWINV(v16 < c->portl || - v16 > c->portu, EBT_STP_PORT)) + if (FWINV(v16 < c->portl || v16 > c->portu, EBT_STP_PORT)) return false; } if (info->bitmask & EBT_STP_MSGAGE) { v16 = NR16(stpc->msg_age); - if (FWINV(v16 < c->msg_agel || - v16 > c->msg_ageu, EBT_STP_MSGAGE)) + if (FWINV(v16 < c->msg_agel || v16 > c->msg_ageu, + EBT_STP_MSGAGE)) return false; } if (info->bitmask & EBT_STP_MAXAGE) { v16 = NR16(stpc->max_age); - if (FWINV(v16 < c->max_agel || - v16 > c->max_ageu, EBT_STP_MAXAGE)) + if (FWINV(v16 < c->max_agel || v16 > c->max_ageu, + EBT_STP_MAXAGE)) return false; } if (info->bitmask & EBT_STP_HELLOTIME) { v16 = NR16(stpc->hello_time); - if (FWINV(v16 < c->hello_timel || - v16 > c->hello_timeu, EBT_STP_HELLOTIME)) + if (FWINV(v16 < c->hello_timel || v16 > c->hello_timeu, + EBT_STP_HELLOTIME)) return false; } if (info->bitmask & EBT_STP_FWDD) { v16 = NR16(stpc->forward_delay); - if (FWINV(v16 < c->forward_delayl || - v16 > c->forward_delayu, EBT_STP_FWDD)) + if (FWINV(v16 < c->forward_delayl || v16 > c->forward_delayu, + EBT_STP_FWDD)) return false; } return true; diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c index 5a61f35..5721a25 100644 --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -130,7 +130,6 @@ ebt_basic_match(const struct ebt_entry *e, const struct sk_buff *skb, const struct ethhdr *h = eth_hdr(skb); const struct net_bridge_port *p; __be16 ethproto; - int verdict, i; if (skb_vlan_tag_present(skb)) ethproto = htons(ETH_P_8021Q); @@ -157,19 +156,15 @@ ebt_basic_match(const struct ebt_entry *e, const struct sk_buff *skb, return 1; if (e->bitmask & EBT_SOURCEMAC) { - verdict = 0; - for (i = 0; i < 6; i++) - verdict |= (h->h_source[i] ^ e->sourcemac[i]) & - e->sourcemsk[i]; - if (FWINV2(verdict != 0, EBT_ISOURCE)) + if (FWINV2(!ether_addr_equal_masked(h->h_source, + e->sourcemac, e->sourcemsk), + EBT_ISOURCE)) return 1; } if (e->bitmask & EBT_DESTMAC) { - verdict = 0; - for (i = 0; i < 6; i++) - verdict |= (h->h_dest[i] ^ e->destmac[i]) & - e->destmsk[i]; - if (FWINV2(verdict != 0, EBT_IDEST)) + if (FWINV2(!ether_addr_equal_masked(h->h_dest, + e->destmac, e->destmsk), + EBT_IDEST)) return 1; } return 0; |